/**
 * Copyright 2015-现在 广州市领课网络科技有限公司
 */
package com.roncoo.education.common.core.tools;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * MD5加密，使用UTF-8编码
 *
 * @author wujing
 */
public final class Sha1Util {

    private Sha1Util() {
    }

    public static final String getSign(String message) {
        MessageDigest md = null;
        String tmpStr = null;
        try {
            md = MessageDigest.getInstance("SHA-1");
            byte[] digest = md.digest(message.getBytes());
            tmpStr = byteToStr(digest);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return tmpStr;
    }

    /**
     * 将字节数组转换为十六进制字符串
     *
     * @param byteArray
     * @return
     */
    private static String byteToStr(byte[] byteArray) {
        String strDigest = "";
        for (int i = 0; i < byteArray.length; i++) {
            strDigest += byteToHexStr(byteArray[i]);
        }
        return strDigest;
    }

    /**
     * 将字节转换为十六进制字符串
     *
     * @param mByte
     * @return
     */
    private static String byteToHexStr(byte mByte) {
        char[] Digit = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
        char[] tempArr = new char[2];
        tempArr[0] = Digit[(mByte >>> 4) & 0X0F];
        tempArr[1] = Digit[mByte & 0X0F];
        return new String(tempArr);
    }

}
